Keystones — Lintel
Five GCSE retrieval questions · 1 February 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 135. What are the numbers?
Answer: 44, 45, and 46 -
2. Algebra
Solve: 7x - 4 = 3x + 20
Answer: x = 6 -
3. Geometry
Opposite = 10cm, adjacent = 11cm. Calculate the angle
Answer: 42.3° -
4. Ratio
Simplify: 24:16:12
Answer: 6:4:3 -
5. Statistics
Calculate the mean of: 47, 18, 40, 35, 44, 43, 6, 31
Answer: 33